Replace error return with warning message when some PostScript or stdout results are different.  This allows the test_noninteractive target to complete without any errors that confuse would-be testers.
Replace error return with warning message when some PostScript or stdout
results are different.  This allows the test_noninteractive target to
complete without any errors that confuse would-be testers.


svn path=/trunk/; revision=10954

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot